Pipe



Nov. 18, i924' J..w. FLOWER PIPE Filed Nov. 12. 1921 Patented Nov.. I8, 1924.

JOI-IN W. FLOWER, OF DETROIT, MICHIGAN, ASSIGNOR, BY MESNEASSIGNIVIENTS, TO

MICHIGAN VALVE FOUNDRY AND ENGINEERING COMPANY, F DETROIT, MICHI- GAN, A CORPORATION 0F MICHIGAN.

PIPE..

Application filed November 12, 1921. Serial No. 514,770.

To all whom t may concer/n,

Be it known that I, JOHN W. FLowER, a citizen ofthe United States, and residing at, Detroit, in the county of Wayne and and which can be constructed aty moderate cost., i

This inventionv consists in a pipe formed ofa strip of malleable metal having flanges along its parallel edges, the flanges belng on the same side of the strip so that, when the stripis bent to cylindrical form, the tube thus constructed has'an external longitudinal-rib; and a clamping member eX- tending along this rib and having m-turned flanges to constitute a channel to receive said rib.

It further consists in forming both the rib on the pipe and the channel of the clamping member dovetailed so as to pre.- vent separation thereof.

It also consists in channeling one or both of the abutting edges of the strip which constitutes the pipe to receive the metal wire which is squeezed to the shape of the channel when the clamping bar is applied to the rib on the pipe.

It also consists in metal rings rigidly mounted on the ends of the pipes that eX- tend into the hubs of couplings, valves or other fittings so as to constitute abutments for the caulking materials.

It also consists of the details of construction illustrated in the accompanying drawing and particularly pointed out in the claims.

In the drawing, Fig. 1 is a transverse sec tion on the line 1-1of Fig. 3, of a portion of pipe showing the joint. Fig. 2 is a section of a coupling on the vline 2-2 of Fig.

3. Figs. 3 and 4 are sections on the lines 3-3 and P-4 of Fig.,2.

Similar reference characters refer to like parts throughout the several views.

`.lhe'pipe shown in the drawing is preferably rolled from a steel strip having a vbody l provided along its edges with flanges 2 and 3 on one "side, which, `when the strip is curved to tubular form, constitute a single longitudinal ribon the tube, and the outer edges t of this rib preferably flare outward'- ly as shown in Fig. 1. The edges of the strip are pressed together by a clamping bar consisting of a body 5 and edge flanges 6a. This bar is rolled with the opposed inner faces of the flanges 6 substantially parallel and after being positioned on the rib on the pipe, the flanges are forced toward each other to conform to the inclined vedges 4C of the rib.. p f

Any desiredv means may be employed to clampl this bar onto the rib, but a heavy press with reciprocating jaws between which the tube and its clampingbar may be fed, is foundA satisfactory.`

One of the contacting edges of the flanges 2 andB is preferably grooved and the other edge fits into this groove, leaving a space at the bottom thereof to receive a wire 7 of copper or other soft metal, which is squeezed to fit the two edges when thel clamping bar is compressed onto the flanges 2 and 3. `As shown in Fig. l, the groove in one edge of the tube is preferably angular, that is, with straight sides meeting at a line longitudinally of the rib on the pipe, and the other edge is formed to lit therein, leaving a small space in the bottom of the groove. l

A coupling for pipe of this character is preferably formed of two parts 8 and 9, each having flanges l0 which receive the bolts 1l. These two parts may be pressforged from heavy steel plates and are therefore of great strength. One of the parts is preferably formed with grooves 12 to receive the clamping-bars 5.

The clamping bars 5 and the ribs 2 and 3 are preferably beveled off at the ends of the pipes, 2 as shown in Fig. 3, leaving the tubular portion l of the pipes. On these ends bands or rings 14 are shrunk to form abutments for the hemp or other packing material 16 usually driven into the spaces between the pipes and the coupling. I prefer to form enlargements 15 on these rings,

' the pipes, internal grooves 19be`ing formedasindicated by the heavy dotted llinesin kFig. 1, and. position these' enlargements in alinement with the clampingy bars :5.

f The pipesl may be united by couplings in the usual manner, as shown.k Hemp or other packing material isdriven into the spaces around the ends yof the pipes, being held i v bythe-shoulders 17 ofthe coupling and by therings 14. yRings 18 of lead or other' soft metal are then cast in the spaces around in the -coupling vfor this purpose. These Inetalrings are .then caulked down in the usual nianner and' atightjoint results;

" Allthe part's are of' greatfstrength and the joint of the pipe' is absolutely reliable.

ffor'the ribs 2" and 3 are produced by the same' rolling operation as the middle part which vlater on forms the tube 1'. Theclampingbarniaybe' made of any desired thicknessso( that vay pressuref'of several thousand fpou'nds'v per square inch can be easilyppro'- yided for. The constant danger of faulty welding.v which'v exists ein lapwelde'd` pipeis v i. y g

n parallel. street' car',` tracks;

Thek proportions of Vthe V'ariou'sfparts of 'piper andits coupling may all be changed by those skilled in the art Without departing from the spirit of my rinvention asset forth in the 'following claims.

' 1. A pipe comprising a tubular body formed by bending a strip of metal to cylindricaly form, said strip having flanges along each edge which flanges when brought together forrn a` longitudinal rib on the pipe, and a clamping bar extending along said rib on the pipe and having in-turned flanges engaging the outer edges of the rib on the pipe, they endsot"r the clamping bar and of the longitudinal rib being cut away at' theA end ofk the pipe, 'and a. instal ring 'securedcn theend'ot thel pipe to hold pack# ing 'when the pipe is inserted .Within y l.

coupling.

2. A pipe comprising a tubular body i termed; by bending a strip of metallto cylindrical form, said strip having flanges along each-edge whichy flanges when-brought ytogether form a longitudinal rib on the pipe,

a clamping bar extending along said rib on the pipe and having iii-turned anges engaging the' outer edges of the rib on the pipe, the ends of the clamping bar and of 'j thelongitndinal rib heiligy cut away at the endl of the pipe, and a metal ring secured on thejend of the pipe to hold packing when the pipe is inserted Withina coupling, said metal ring having an enlargement vin alinen'ient' with the clamping bar.-

y JoHNl-W. FLoWEa 

